Kapunda DC is underlain by folded Adelaidean and Cambrian metasediments which host important mineral deposits in the area. An estimated 15 million tonnes of ore averaging 1.2% copper remains near the Kapunda mine, with potential for further discoveries to the north and NE. Two bands of Cambrian limestone and marble to the east of Kapunda have potential to support a significant stone industry. There is also a growing market for natural phosphate from associated deposits. Fords dolomite quarry 5.5 km SW of Kapunda produces high quality aggregate, and extensions, if located, could become an important source of carbonate aggregate for northern metropolitan Adelaide. Talc deposits in the Truro area will probably be re-opened at some future time. Fine sand deposits along the western margin of the Barossa Valley and to the SE of Linwood are suitable for filling sand and cement manufacture.